fix bug with dragonfly leaving trailing bits
Fixed voxel trails from animations
- removed stageForDeletion behavior of VoxelNode
- replaced with VoxelNodeDeletionHook strategy
- VoxelSystem now cleans up previously used VBO index slots via hook
Fixed issue with freeing up abandoned VBO slots when not moving with animation
Merge branch 'master' of https://github.com/worklist/hifi into bug_fixes
removed unneeded cast
fixed typo
fixed spacing
changed some defines to consts
Improved VoxelNode delete callback based on CR feedback
- changed hooks to use a virtual base class approach
- switched account of hooks to use a vector instead of home grown solution
- added support for VoxelNode to know what VoxelSystem it belongs to
Merge pull request #726 from ZappoMan/bug_fixes

fix bug with dragonfly leaving trailing bits